Photo of strabismus surgery. The medial rectus muscle is being disinserted following pre-placement of vicryl sutures. A Castroviejo locking forceps is grasping the superior pole of the muscle, while a pair of Manson-Aebli scissors does the cutting. The eyelids are being held by a Cook speculum. Strabismus surgery is surgery on the extraocular muscles to correct the misalignment of the eyes.